| CPC G02B 27/0176 (2013.01) [G02B 2027/0178 (2013.01)] | 20 Claims |

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1. A projection mechanism applied to glasses comprising a rim and temples, comprising:
an arc-shaped guide rail;
a mounting bracket slidably arranged on the arc-shaped guide rail and provided with a through hole; and
a projection assembly inserted in the through hole;
wherein the arc-shaped guide rail and the mounting bracket are respectively used to connect the rim and the temples, and the mounting bracket can be located at a first position or a second position of the arc-shaped guide rail; when the mounting bracket is located at the first position of the arc-shaped guide rail, a light source output end of the projection assembly faces toward the rim; when the mounting bracket is located at the second position of the arc-shaped guide rail, the projection assembly is far away from the rim.
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